Caul nobby



C. NORBY.

PISTON ROD GUIDE AND SUPPORT.

APPLICATlON FILED MAR. 2.1915- Patented Aug. 22, 1916.

FFIGE.

CARL NORBY, OF FERRY POINT, ALBERTA, CANADA.

PISTON-ROD GUIDE AND SUPPORT.

Specification of Letters Patent.

Patented Aug. 22, 1916.

Application filed March 2, 1915. Serial No. 11,620.

To all whom it may concern:

Be it known that I, CARL NORBY, a subject of the King of Great Britain, residing at Ferry Point, in the Province of Alberta and Dominion of Canada, have invented new and useful Improvements in Piston-Rod Guide and Supports, of which the following is a specification.

This invention relates to improvements 1n guides and supports for piston rods and has particular application to a swinging guide and support in contradistinction to the usual sliding cross head.

In carrying out the present invention, it is my purpose to improve and simplify the general construction of piston rod guides of the class described and to provide a guide whereby the piston rod will be supported efficiently and effectively so that the same will traverse a straight path.

With the above and other objects in view, the invention consists in the construction, combination and arrangement of parts hereinafter set forth in and falling within the scope of the claims.

In the accompanying drawing, Figure 1 is a fragmentary side elevation of a locomo tive equipped with a piston rod guide con structed in accordance with the present invention. Fig. 2 is a sectional view on the line 2-2 of Fig. 1. Fig. 3 is a View in front elevation of the guide. Fig. 1 is a similar view showing the parts of the guide in the positions they assume when the piston rod is at the center of its path of movement. Fig. 5 is a perspective view of the support.

Referring now to the drawing in detail, 1 designates the driving cylinder of a locomotive, while 2 indicates the piston rod connected with the piston in such cylinder and capable of rectilinear movement in a horizontal plane, as usual. Pivotally connected to the outer end of the piston rod 2 is a connecting rod 3 extending rearwardly of the locomotive. and connected through suitable mechanism with the drive wheels of the 10- comotive. Fastened to an appropriate support and disposed to one side of the path of movement of the piston rod approximately centrally of such path is a supporting plate at and secured to the plate 4 is one limb of a U-shaped yoke 5 arranged transversely of the path of movement of the piston rod and substantially inclosing the latter, the limbs of the yoke, adjacent to the upper extremities thereof, being formed with horizontally alining openings 6 intersecting the path of movement of the rod 2. Secured to an ap propriate support at one side of the plate 1 above the latter is a base plate 7, while secured to a support at the opposite side of the plate 4 above the latter and in a plane below the plate 7 is a base plate 8 and pro jecting outwardly from each plate is a pivot stud 9 to which is pivoted one end of a link 10. The remaining ends of the links 10, 10 project toward each other and are pivotally connected to the top and bottom ends respectively of a vertically disposed link 11, the link 10 at the lower end of the link 11 being disposed at the rear side of the lastmentioned link, while the link 10 connected to the upper end of the vertical link is preferably secured to the front side thereof. Projecting outwardly from the front side of the vertical link 11 approximately centrally thereof is a horizontally disposed pivot pin 12 and pivotally connected to the pin 12 and depending therefrom is an arm 13 having the lower end thereof pivoted upon the pin or bolt connecting the piston rod 2 with the connecting rod 3. The link 11 is disposed in a plane coincident with that of the yoke 5 and passed through the'alining openings 6 in the upper extremities of the yoke are pivot pins 14 having the inner ends thereof disposed at opposite sides of the path of movement of the piston rod. Links 15, 15 are disposed at opposite sides of the path of movement of the arm 13 and the lower ends of the links 15 are pivoted upon the pins 14 respectively, while the upper ends of such links are pivotally connected to the opposite ends of a pivot pin 16 carried by the arm 13 approximately centrally thereof.

In practice, the arm 13 is swung about the pivot pin 12 from the full line position to the dotted line position, in Fig. 3 and vice versa, as the piston rod 2 reciprooates and in the swinging movement of the arm 13 the outer ends of the links 15 traverse an are as indicated by the dot and dash lines in Fig. 3. Simultaneously with the swinging of the arm 13, the link 11 traverses a vertical path as shown by the dot and dash lines in Fig. 3 and when the arm 13 is in a perpendicular position as illustrated in Fig. 4, the link 11 is at its limit of upward movement, while when the arm is at one end or the other of the path of movement of the piston rod, the link 11 is in its lowermost position as illustrated in Fig. 3. In the rectilinear movement of the piston rod, the link 11 and links 10'permit the upper end of the arm 13 to move vertically and at the same time swing about the pivot 12, while the links 15 take the weight of the piston rod and so hold the latter in a true horizontal line in the operation of the engine, the lower portion of the arm 13 swinging between the links 15 to one side or the other thereof in accordance with the movement of the piston rod.

From the foregoing description taken in connection with the accompanying drawing, the construction and mode of operation of my improved piston rod guide and support will be readily apparent. It will be seen that I have provided a piston rod guide and support whereby the usual sliding cross head and guides may be eliminated and the piston rod supported for movement in a straight line.

I claim:

1. In a piston rod guide, the combination with a piston rod capable of rectilinear movement, of an arm, a pivotal connection between one end of said arm and said rod,

means connected to the upper end of said arm and supporting the same for sliding and swinging movement, a link, a support for said link at the center of the path of movement of said rod, a pivotal connection between one end of said link and support, and a pivotal connection between the remaining end' of said link and said -'arm whereby the weight of the piston rod will be transferred to said link in the sliding movement of said rod.

2. In a piston rod guide, the combination with a piston rod capable of rectilinear movement, of an arm, a pivotal connection between one end of said arm and rod, means connected with the other end of said arm and supporting the same at the center of the path of movement of said piston rod for sliding and swinging movement, links disposed at the opposite sides of said arm, a support for said links at the center of the path of movement of said arm and below said means, pivotal connections between the supported ends of said links and thesupport, and pivotal connections between the remaining ends of said links and said arm whereby the links will receive the weight of the piston rod in the movement of the latter.

8. In a piston rod guide, the combination with a piston rod capable of rectilinear movement, of an arm, a pivotal connection between one end of said arm and the end of said piston rod, links connected to the remaining end of said arm and supporting the same at the center of the path of movement of said piston rod above the latter for sliding and swinging movement, links disposed at the opposite sides of said arm, a support for said links at the center of the path of movement of said piston rod below said first links, pivotal connections between the supported ends of said last links and'said support, and pivotal connections between the remaining ends of said last links and said arm whereby the said last links will take the weight of the piston rod in the movement thereof. 7

In testimony whereof I affix my signature in presence of two witnesses.

' CAR-L NORBY.

Witnesses:

WM. R. SQUANOE, ANNIE S. TAYLOR.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

